Bussmann KTU Data Sheet
Limitron
®
KTU
Fast-Acting, Class L Fuses 601-6000A
600 Volt
Form No. KTU
Page 1 of 2
BIF Doc #1010
Bussmann
®
12-21-98
SB98107
Rev. A
601Ato800A
801A
to
1200A
1350Ato1600A
1800Ato2000A
2001A
to
2500A
3000A
3500A
to
4000A
4500A
to
5000A
6000A
1.75"
1.38"
.81"
.88"
1.75"
1.38"
.88"
1.63"
6.75"
3.75"
1"
1".75"
.75"
.75"
.5"
2.75"
.44"
2.38"
.38".38"
2"
2.5"
2"
2.5" 3" 3.5"
3.5"
5"
4"
5"
4.75"
5.75"
5.25"
6.25"
5.75"
7.13"
10.75"
(±0.09)
8.63"
(±0.09)
6.75"
5.75"
.63" (± 0.03)
All Slots and Holes
Terminals:
Width (±0.06)
Thickness (±0.03)
Catalog Symbol: KTU
Fast-Acting
Current-Limiting
Ampere Rating: 601 to 6000 Amperes
Voltage Rating: 600 Volts AC (or less)
Interrupting Rating: 200,000 RMS Sym.
Bolt Mount
Agency Approvals:
UL Listed, Std. 248-10, Class L, Guide JDDZ, File E4273
CSA Certified, C22.2 No. 248.10, Class 1422-02, File 53787
Ampere Ratings (600 VAC)†
Catalog Ctn.
Weight*
Catalog Ctn.
Weight*
Number Qty. Lbs. Kg. Number Qty. Lbs. Kg.
KTU-601 KTU-1800
1 8.5 3.855
KTU-650 KTU-2000
KTU-700 1 3.75 1.70 KTU-2001
1 17 7.711
KTU-750 KTU-2500
KTU-800 KTU-3000 1 17.25 7.824
KTU-850 KTU-3500
KTU-900
1 4.25 1.927
KTU-4000
1 24 10.886
KTU-1000 KTU-4500
KTU-1200 KTU-5000
1 31 14.061
KTU-1350 KTU-6000 1 34 15.422
KTU-1400
KTU-1500
1 6 2.721
KTU-1600
†601-3000A is rated 340 VDC and 50 KAIC.
*Weight per carton.
Dimensional Data
General Information:
• Fast-acting, short-circuit protection. Particularly suited for protection of circuit breakers with lower interrupting ratings and
non-inductive loads such as lighting and heating circuits.
• 99.9% pure silver-links provide low watt loss and low
operating temperature on normal current levels; minmizes
total clearing I
2
t fault energy let-through.
• High grade silica-sand filler accelerates response of fuse to
short-circuits by having a quenching effect upon the fuse arc.
• O-ring seals maximize pressure build-up during currentlimiting actions and ensure filler retention.
• Silver-plated micro-peened terminals provide high electrical
conductivity, minimize heat generation, and keep fuses and
switches cool.
• UL interrupting rating of 200,000 amperes.
• Selective coordination (blackout prevention).
• Glass melamine tube.
• Silver-plated end bells.
• No fuse reducers available.
Fuseblocks (601 - 1200A):
Catalog Number Poles
51215 1
51235 3
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 314-527-1270 for more information.
*All other tolerances (±0.02)
12-21-98
SB98107
Rev. A
Limitron
®
KTU
Fast-Acting, Class L Fuses 601-6000A
600 Volt
Form No. KTU
Page 2 of 2
BIF Doc #1010
Bussmann
®
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is
intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change
design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained
in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Current-Limitation Curves Time-Current Characteristic Curves–Average Melt
400,000
100,000
10,000
A
B
6000
5000
4000
3000
2500
2000
1600
1200
800
601
AMPERE
RATING
300
100
10
800A
1200A
1600A
1350A
2000A
3000A
4000A
5000A
6000A
AMPERE
RATING
1,000
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
1,000
PROSPECTIVE SHORT-CIRCUIT CURRENT
SYMMETRICAL RMS AMPERES
10,000
100,000
200,000
1
TIME IN SECONDS
.1
.01
1,000
CURRENT IN AMPERES
10,000
100,000
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